2) If the side of a square is increased by 5 the area is multiplied by 4. Find the side of the original square.
3) A rectangular lot is 20 yards longer than it is wide and its area is 2400 square yards. Find the
dimensions of the lot.
4) The length of a room is 8 ft greater than its width. If each dimension is increased by 2 ft, the
area will be increased by 60 sq. ft. Find the dimensions of the rooms.
5) The length of a rectangular lot is 4 rods greater than its width, and its area is 60 square rods.
Find the dimensions of the lot.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752